Front face of a concrete wall block



FIG. 1 is a front view of a front face of a concrete wall block;

FIG. 2 is a top, front, and left side isometric view thereof; and,

FIG. 3 is a top, front, and right side isometric view thereof.

The broken lines shown in the drawings are included for purposes of illustrating environment and form no part of the claimed design. The surface shading lines show contour and/or distinguish between open and solid areas. The surface shading lines are not surface ornamentation. 

CLAIM We claim the ornamental design for a front face of a concrete wall block, as shown and described. 